Although my salary was a very good, competitive US rate at senior level, my artwork brought in more income for 2 years straight. I decided that it wasn't worth burning my candle at both ends any more, especially with a young child at home. Something had to give, and it was the job.
Now I still work like an engineer. I spend 4-5 hours a day programming and 2-3 hours managing my commitments and social media. My artwork is generative, so I use Javascript to build elaborate systems which yield visual artworks.
The stuff I do is much more diverse now. I just spent an hour totally leveling a table I built recently. I needed a custom table for my Axidraw pen plotter, which I use to draw generative artworks.
The pay is nothing, then a lot, then nothing. I'm white-knuckling it. At times it's very scary to not have a steady stream of income. But it allows me to be happy, and that's worth more than any amount of comfort.